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Registro Completo |
Biblioteca(s): |
Embrapa Territorial. |
Data corrente: |
31/08/2017 |
Data da última atualização: |
03/05/2019 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
CASTRO, G. S. A.; CRUSCIOL, C. A. C.; ROSOLEM, C. A.; CALONEGO, J. C.; BRYE, K. R. |
Afiliação: |
GUSTAVO SPADOTTI AMARAL CASTRO, CNPM; CARLOS ALEXANDRE COSTA CRUSCIOL, UNESP; CIRO ANTONIO ROSOLEM, UNESP; JULIANO CARLOS CALONEGO, UNESP; K. R. BRYE, UNIVERSITY OF ARKANSAS. |
Título: |
Surface lime and silicate application and crop production system effects on physical characteristics of a Brazilian Oxisol. |
Ano de publicação: |
2017 |
Fonte/Imprenta: |
Soil Research, v. 55, n. 5/6, jun. 2017. |
Páginas: |
p. B-J. |
Idioma: |
Português |
Conteúdo: |
This work aimed to evaluate the effects of crop rotations and soil acidity amelioration on soil physical properties of an Oxisol (Rhodic Ferralsol or Red Ferrosol in the Australian Soil Classification) from October 2006 to September 2011 in Botucatu, SP, Brazil. Treatments consisted of four soybean (Glycine max)?maize (Zea mays)?rice (Oryza sativa) rotations that differed in their off-season crop, either a signal grass (Urochloa ruziziensis) forage crop, a second crop, a cover crop, or fallow. Two acid-neutralising materials, dolomitic lime (effective calcium carbonate equivalent (ECCE) = 90%) and calcium-magnesium silicate (ECCE = 80%), were surface applied to raise the soil?s base saturation to 70%. Selected soil physical characteristics were evaluated at three depths (0?0.1, 0.1?0.2, and 0.2?0.4 m). In the top 0.1 m, soil bulk density was lowest (P < 0.05) and macroporosity and aggregate stability index were greatest (P < 0.05) in the forage crop compared with all other production systems. Also, bulk density was lower (P < 0.05) and macroporosity was greater (P < 0.05) in the acid-neutralising-amended than the unamended control soil. In the 0.1?0.2-m interval, mean weight diameter and mean geometric diameter were greater (P < 0.05) in the forage crop compared with all other production systems. All soil properties evaluated in this study in the 0.2?0.4-m interval were unaffected by production system or soil amendment after five complete cropping cycles. Results of this study demonstrated that certain soil physical properties can be improved in a no-tillage soybean?maize?rice rotation using a forage crop in the off-season and with the addition of acid-neutralising soil amendments. Any soil and crop management practices that improve soil physical properties will likely contribute to sustaining long-term soil and crop productivity in areas with highly weathered, organic matter-depleted, acidic Oxisols. MenosThis work aimed to evaluate the effects of crop rotations and soil acidity amelioration on soil physical properties of an Oxisol (Rhodic Ferralsol or Red Ferrosol in the Australian Soil Classification) from October 2006 to September 2011 in Botucatu, SP, Brazil. Treatments consisted of four soybean (Glycine max)?maize (Zea mays)?rice (Oryza sativa) rotations that differed in their off-season crop, either a signal grass (Urochloa ruziziensis) forage crop, a second crop, a cover crop, or fallow. Two acid-neutralising materials, dolomitic lime (effective calcium carbonate equivalent (ECCE) = 90%) and calcium-magnesium silicate (ECCE = 80%), were surface applied to raise the soil?s base saturation to 70%. Selected soil physical characteristics were evaluated at three depths (0?0.1, 0.1?0.2, and 0.2?0.4 m). In the top 0.1 m, soil bulk density was lowest (P < 0.05) and macroporosity and aggregate stability index were greatest (P < 0.05) in the forage crop compared with all other production systems. Also, bulk density was lower (P < 0.05) and macroporosity was greater (P < 0.05) in the acid-neutralising-amended than the unamended control soil. In the 0.1?0.2-m interval, mean weight diameter and mean geometric diameter were greater (P < 0.05) in the forage crop compared with all other production systems. All soil properties evaluated in this study in the 0.2?0.4-m interval were unaffected by production system or soil amendment after five complete cropping cycles. Results of this stu... Mostrar Tudo |
Palavras-Chave: |
Aggregation; No-tillage system; Silicate application. |
Thesaurus Nal: |
Liming; Soil structure. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/163275/1/4842.pdf
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Marc: |
LEADER 02660naa a2200241 a 4500 001 2074751 005 2019-05-03 008 2017 bl uuuu u00u1 u #d 100 1 $aCASTRO, G. S. A. 245 $aSurface lime and silicate application and crop production system effects on physical characteristics of a Brazilian Oxisol.$h[electronic resource] 260 $c2017 300 $ap. B-J. 520 $aThis work aimed to evaluate the effects of crop rotations and soil acidity amelioration on soil physical properties of an Oxisol (Rhodic Ferralsol or Red Ferrosol in the Australian Soil Classification) from October 2006 to September 2011 in Botucatu, SP, Brazil. Treatments consisted of four soybean (Glycine max)?maize (Zea mays)?rice (Oryza sativa) rotations that differed in their off-season crop, either a signal grass (Urochloa ruziziensis) forage crop, a second crop, a cover crop, or fallow. Two acid-neutralising materials, dolomitic lime (effective calcium carbonate equivalent (ECCE) = 90%) and calcium-magnesium silicate (ECCE = 80%), were surface applied to raise the soil?s base saturation to 70%. Selected soil physical characteristics were evaluated at three depths (0?0.1, 0.1?0.2, and 0.2?0.4 m). In the top 0.1 m, soil bulk density was lowest (P < 0.05) and macroporosity and aggregate stability index were greatest (P < 0.05) in the forage crop compared with all other production systems. Also, bulk density was lower (P < 0.05) and macroporosity was greater (P < 0.05) in the acid-neutralising-amended than the unamended control soil. In the 0.1?0.2-m interval, mean weight diameter and mean geometric diameter were greater (P < 0.05) in the forage crop compared with all other production systems. All soil properties evaluated in this study in the 0.2?0.4-m interval were unaffected by production system or soil amendment after five complete cropping cycles. Results of this study demonstrated that certain soil physical properties can be improved in a no-tillage soybean?maize?rice rotation using a forage crop in the off-season and with the addition of acid-neutralising soil amendments. Any soil and crop management practices that improve soil physical properties will likely contribute to sustaining long-term soil and crop productivity in areas with highly weathered, organic matter-depleted, acidic Oxisols. 650 $aLiming 650 $aSoil structure 653 $aAggregation 653 $aNo-tillage system 653 $aSilicate application 700 1 $aCRUSCIOL, C. A. C. 700 1 $aROSOLEM, C. A. 700 1 $aCALONEGO, J. C. 700 1 $aBRYE, K. R. 773 $tSoil Research$gv. 55, n. 5/6, jun. 2017.
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Embrapa Territorial (CNPM) |
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Registro Completo
Biblioteca(s): |
Embrapa Amazônia Oriental. |
Data corrente: |
30/11/1993 |
Data da última atualização: |
19/08/2020 |
Autoria: |
WISNIEWSKI, A.; MELO, C. F. M. de. |
Afiliação: |
ALFONSO WISNIEWSKI, FCAP; CELIO FRANCISCO MARQUES DE MELO, CPATU. |
Título: |
Borrachas naturais brasileiras II. Borrachas fracas; borrachas de H. benthamiana e H. guianensis. |
Ano de publicação: |
1981 |
Fonte/Imprenta: |
Belém, PA: EMBRAPA-CPATU, 1981. |
Páginas: |
24 p. |
Descrição Física: |
il. |
Série: |
(EMBRAPA-CPATU. Miscelânea, 7). |
Idioma: |
Português |
Conteúdo: |
Comparam-se as propriedades das borrachas procedentes de três espécies do gênero Hevea, a H. brasiliensis Müll Arg., a H. benthamiana Müll Arg. e a H. guianensis Aubl, sendo o produto destas duas últimas conceituado como de qualidade inferior e comercializado com a designação genética de borracha fraca. Na determinação dos parâmetros utilizaram-se os métodos recomendados pelo A.S.T.M. e a fórmula de vulcanização tipo "goma pura" foi a 1-A preconizada pela American Chemical Society para borracha extrativas. |
Palavras-Chave: |
Amazonas; Análise socio-economica; Barracha brasileira; Belém; Borracha fraca; Borracha natural; Brasil; Hevea benthamiana; Hevea guianensis; Manaus; Natural rubber; Pará; Property; Propriedade; Rubber tree; Socioeconomic analysis; Weak rubber. |
Thesagro: |
Análise Estatística; Borracha; Hevea Brasiliensis; Qualidade; Seringueira; Tecnologia. |
Thesaurus NAL: |
statistical analysis; technology. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/59516/1/Miscelanea-7.pdf
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Marc: |
LEADER 01715nam a2200445 a 4500 001 1379779 005 2020-08-19 008 1981 bl uuuu u0uu1 u #d 100 1 $aWISNIEWSKI, A. 245 $aBorrachas naturais brasileiras II. Borrachas fracas; borrachas de H. benthamiana e H. guianensis. 260 $aBelém, PA: EMBRAPA-CPATU$c1981 300 $a24 p.$cil. 490 $a(EMBRAPA-CPATU. Miscelânea, 7). 520 $aComparam-se as propriedades das borrachas procedentes de três espécies do gênero Hevea, a H. brasiliensis Müll Arg., a H. benthamiana Müll Arg. e a H. guianensis Aubl, sendo o produto destas duas últimas conceituado como de qualidade inferior e comercializado com a designação genética de borracha fraca. Na determinação dos parâmetros utilizaram-se os métodos recomendados pelo A.S.T.M. e a fórmula de vulcanização tipo "goma pura" foi a 1-A preconizada pela American Chemical Society para borracha extrativas. 650 $astatistical analysis 650 $atechnology 650 $aAnálise Estatística 650 $aBorracha 650 $aHevea Brasiliensis 650 $aQualidade 650 $aSeringueira 650 $aTecnologia 653 $aAmazonas 653 $aAnálise socio-economica 653 $aBarracha brasileira 653 $aBelém 653 $aBorracha fraca 653 $aBorracha natural 653 $aBrasil 653 $aHevea benthamiana 653 $aHevea guianensis 653 $aManaus 653 $aNatural rubber 653 $aPará 653 $aProperty 653 $aPropriedade 653 $aRubber tree 653 $aSocioeconomic analysis 653 $aWeak rubber 700 1 $aMELO, C. F. M. de
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